[c-nsp] Switch support for IPv6 policing

[Vincent C Jones]

Arrgh. Currently filtering and policing user traffic on Cisco 2960
switches and discovered the hard way that the ingress policy ONLY
applies itself to IPv4 packets and only IPv4 access-groups can be
applied to an interface. What Cisco switches do I have to upgrade to in
order to filter and police ALL customer traffic and not just IPv4
traffic?

Vince